"acknowledged publicly" is correct and can be used in written English.
It is typically used to describe a situation in which someone confesses or admits something publicly, particularly in a ceremonial or formal way. For example: "At the ceremony, the mayor acknowledged publicly that the city had failed to properly manage its finances."
His departure had not been acknowledged publicly before last week.
— that executives fear bigger risks in building new coal-fired plants than they have acknowledged publicly.
Foreign policy experts say the practice of former officials' returning for business is more common than acknowledged publicly.
JetBlue Airways acknowledged publicly that it had provided a Pentagon contractor with information on more than one million passengers.
On Tuesday, even as Judge Danilkin was reading his verdict, Russia's president, Dmitri A. Medvedev, acknowledged publicly that the Russian investment climate was "bad".
He has acknowledged publicly that he bet through Agate, including $40,000 on one of his company's clients, Roger Federer, in the 2007 French Open men's final.
The chief minister of Assam, Tarun Gogoi, has acknowledged publicly that India is ten years behind in "training" its part of the river.
If those who oppose the occupation acknowledged publicly that it justifies Palestinian terrorism, then those who support the occupation would have to explain why it doesn't.
Ron Meyer has acknowledged publicly that the company deserves criticism, and he knows he can't control what Finke is going to write.
Yesterday, Mr. Weill acknowledged publicly for the first time that he had urged Mr. Grubman in 1999 to "take a fresh look" at AT&T.
B9 BUSINESS DAY C1-16 PriViolatedlated by JetBlue The airline acknowledged publicly that it provided a Pentagon contractor with information on more than one million passengers.
